Ch. 6 Circuits Flashcards
1
Q
Current formula
A
I = Q / delta T
2
Q
Kirchhoff’s junction rule
A
I into junction = I out of junction
3
Q
Kirchhoff’s loop rule
A
Vsource= Vdrop
4
Q
Def of resistance
A
R= p L /A. p = density L = length A= Area
5
Q
Ohm’s law
A
V= I R
6
Q
- Voltage and Cell EMF
A
V = Ecell - internal resistance
7
Q
Def of Power ( formula)
A
P = W/ t= P= delta E/ t
8
Q
Electric power
A
P= IV= I^2R= V^2 / (R)
9
Q
Voltage drop across series
A
Vs= V1 + V2 ……
10
Q
Eq resistance (series)
A
Rs = R1 + R2 …..
11
Q
Voltage drop ( parallel)
A
Vp= V1= V2 ….
12
Q
Equivalent resistance ( parallel)
A
1/ Rp = 1/ R1 + 1/R2 + 1/R3 …
13
Q
Capacitance
A
C= Q/ V
14
Q
Capacitance based on parallel plate geometry
A
C= E0 ( A/ d)
E0 is a constant
15
Q
Electric field in a capacitor
A
E = V/d
16
Q
Potential energy of a capacitor
A
U= 1/2 CV^2
17
Q
Capacitance with a dielectric material
A
C’= kC
18
Q
Equivalent capacitance ( series)
A
1/ Cs = 1/C1 + 1/C2 ….
19
Q
Equivalent capacitance (parallel )
A
Cp = C1 + C2 + C3 ……
